GL Class (X164) 2007-2012: GL320CDI, GL420CDI, GL450, GL550

Car external temp gauge

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Old Nov 1, 2011 | 05:27 PM
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blee911's Avatar
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2011 GL350 Bluetech, 2000 Porsche 911 C2, 2005 Honda S2000
Question Car external temp gauge

The temp gauge doesn't seem to function well. It can be 70 degrees outside and if my car is stationary, the gauge reads 100. The dealer checked the thermometer and said it's operating within spec. Anyone else have this problem? Seems like an inherent design / placement issue with the GL. If I'm not the only one with this problem, I'll live with it.
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Old Nov 1, 2011 | 06:03 PM
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2022 E53 SG
It tends to be inaccurate for me until i start driving it around for a minute or so. My subaru does the same.
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Old Nov 1, 2011 | 06:09 PM
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2011 GL350 Bluetech, 2000 Porsche 911 C2, 2005 Honda S2000
Originally Posted by ddcha
It tends to be inaccurate for me until i start driving it around for a minute or so. My subaru does the same.
Thanks. I guess I've been lucky with my other cars!
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Old Nov 1, 2011 | 09:32 PM
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2008 GL 320 CDI Black/Black
Originally Posted by ddcha
It tends to be inaccurate for me until i start driving it around for a minute or so. My subaru does the same.
Agreed. Every car I've owned has not been right on until you drive for a bit.
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Old Nov 1, 2011 | 09:41 PM
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2011 GL350 Bluetec, Irridium over Black Leather
Originally Posted by BJ021
Agreed. Every car I've owned has not been right on until you drive for a bit.
The sensor heat-soaks from all the trapped hot air while it's sitting. It takes a little airflow over it to cool it down to ambient.

- Mark
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Old Nov 4, 2011 | 01:57 PM
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2014 Black SLK 55 AMG, Black 2015 GL 550, 2011 Blue GLK 350
Mark is correct, the sensor needs airflow for a few minutes of driving to get the correct temp. If your car has been sitting after driving, it can show extremely high temps when you first start up. I have a 2005 Z4 that the sensor reads exactly what it read when I shut the car off- hot or cold. Then it also requires a few minutes of driving to get the right temp.
So, Blee- drive for a bit and you should get an accurate reading.

Cheers
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